Which work by Tacitus deals primarily with Germanic tribes?

The work by Tacitus that deals primarily with Germanic tribes is "Germania." In this text, Tacitus provides an ethnographic account of the various Germanic tribes that were known to the Romans during his time. He explores their customs, social structures, and interactions with the Roman Empire.

"Germania" is significant not only for its detailed descriptions of the tribes but also for its insights into the Roman perspective on these peoples, contrasting their lifestyles with those of the Romans. Tacitus highlights aspects such as the governance of the tribes, their warrior culture, religious practices, and their views on warfare, all of which contributed to Roman understanding and attitudes towards the Germanic tribes.

The other options include works that, while important, do not focus specifically on Germanic tribes. "Agricola" deals primarily with the life and accomplishments of Tacitus's father-in-law, Gnaeus Julius Agricola, particularly his military campaigns in Britain. "Punica," attributed to another author, Silius Italicus, focuses on the Second Punic War. "Thebaid," a work by Statius, chronicles the mythological conflict in Thebes. Thus, "Germania" stands out as Tacitus's dedicated account of Germany